lI.-.<, 



*' I 



476 



MOSOGUAPHS OF NOE{TH AMERICAN EODBNTIA. 



of the sides, and the latter is sometimes very pale yellowish-gray, &c. I 

 have observed no plumbeous or entirely gray stage like that frequently or 

 usually seen in young He.speromif-s ; and I have failed to determine what defi- 

 nite relation, if any, the observable ditferences in coloration bear to sex 

 or age. 



The animal varies much in size, and to some extent in proportions, 

 espeeiaUy the length of the tail. This is tiie most variable dimension, as 

 usual in all such cases of high development of parts. A tendency to superior 

 size in specimens from the Rocky Mountains and vk'estward has been noted. 

 The following table of measurements of an alcdholic series indicates very 

 fairly the dimensions, and. to some extent, the variations in size and pro- 

 portions: — ■• I- i '. 



TaBlk I. — Mtatiircmentt of Iwcnly-oun alwkolio speeimem o/Zapu8 huiwokiiis. 

 Skulls mcnanre fruro 0.90 to 1.00 by 0.4S to 0.50. 



a u 



- a 



2 " 



li 



S593 



•am 

 laai 

 )me 



83SrT 

 S393 

 SS94 

 3390 

 SMO 

 3003 

 SK06 



a«07 



3608 

 3604 

 CliOl 

 3603 

 3603 

 9011 

 ^!0 

 1939 



scog 



Locality. 



lUlllM, N..S 



Middloboru', Mrbs.. 

 do.. 



do 



do.... 



do 



Burllnntoii, Vt 



Wethnsfleld, Coon 



do 



W»lerville, K. T 



do 



do 



do 



PblUdnlphla, Pa 



Carllale.P« 



do 



do 



We«tNortlifleld,lll ... 

 Difwr MUnonrl River.. 



PlatU) lilviT >«br 



Stellacooni, W. T 



Atituku 



*A11 meaanromenta ore In KaKliah Inuhes and deoimala. 



OEOORAPHICAl. DI8TBIBUTI0N. 



The dispersion of Znpus hudsonivs in North America can at present be 

 given only in somewhat general terms, pending precise information respect- 



i-L 



